HR: 10:20h
AN: G42A-01 INVITED     [Abstracts]
TI: InSAR-derived constraints on earthquakes: What can we learn and how well can we know it?
AU: * Lohman, R B
EM: rlohman@whoi.edu
AF: Woods Hole Oceanographic Institution, MS 24 WHOI, Woods Hole, MA 02543 United States
AB: Interferometric Synthetic Aperture Radar (InSAR) observations of fault activity now span a wide range of tectonic regimes and styles, including earthquakes throughout the magnitude spectrum, interseismic and postseismic deformation, and both shallow and deep triggered and transient slip episodes. Moving from observations of deformation to inferences about processes occurring on the fault plane at depth involves several stages of assumptions and generalizations that restrict the infinite family of potential models down to a more manageable and, hopefully, more realistic set. Frequently employed approximations include the choice of simplified fault plane geometry and crustal rigidity structure, style of atmospheric water vapor variations, and imposed fault slip model characteristics such as roughness constraints. I review the effects that these approximations have on fault slip inversions, including estimates of the magnitude of bias induced and a determination under what circumstances the approximations are appropriate for real earthquakes.
DE: 1209 Tectonic deformation (6924)
DE: 1243 Space geodetic surveys
DE: 1294 Instruments and techniques
SC: Geodesy [G]
MN: Fall Meeting 2005